Apparatus for beveling felt protective pads



Oct. 12, 1954 J. F. FILLER 2,691,417

' APPARATUS FOR BEVELING FELT PROTECTIVE PADS Filed Nov. 9. 1949 5Sheets-Sheet 1 I Win H h. "mm "mum. is

r -E i1 vie y/g/M FIZZ/5 Oct. 12, 1954 .1. F. FILLER 2,691,417

APPARATUS FOR BEVELING FELT PROTECTIVE PADS Filed Nov. 9. 1949 3 5Sheets-Sheet 2 Oct. 12, 1954 J, PlLLER 2,691,417

APPARATUS FOR BEVELING FELT PROTECTIVE PADS Filed Nov. 9. 1949 sSheets-Shea 4 fru efzfar v (/OiZFBlZk/ (jct. 12, 1954 J. F. PILLER2,691,417

APPARATUS FOR BEVELING FELT PROTECTIVE PADS Filed Nov... 9, 1949 5Sheets-Sheet 5 by 4:5 .21; w

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Patented Oct. 12, 1954 APPARATUS FOR BEVELING FELT PROTECTIVE PADS JohnF. Piller, Chicago, Ill., assignor to The Scholl Mfg. 00., Inc.,Chicago, 111., a. corporation of New York Application November 9, 1949,Serial No. 126,409

6 Claims. (Cl. 164-71) fortable than a pad having parallel top andbottom surfaces. While the beveled protective pad has been found to befar superior to the pads now on the market, due to the increased comfortto the wearer of the pad, beveled pads have never been supplied incommercial quantities to any great extent due to the fact that it hasnot heretofore been possible to bevel the soft felt of the pad bymachine, such pads which have formerly been produced being beveled byhand, making them extremely costly to manufacture.

One object of the present invention is to remedy the foregoingdifficulties by providing a novel and improved method and apparatus forefficiently and inexpensively beveling soft felt protective pads forcorns or the like.

A further object of my invention is to provide a novel method forbeveling soft felt protective pads in a more efficient and facile mannerthan formerly by cutting the outer and top surfaces of the pad at thedesired angle of the bevel with a high speed knife like rotary cuttingaction movable transversely of the top surface of the pad and followingthe contour of the periphery of the pad.

A further and more specific object of my invention is to provide a newand improved form of apparatus for beveling the top and outer surfacesof soft felt protective pads of various desired shapes by providing arotary knife rotatably driven at a high rate of speed with its cuttingedge inclined at substantially the angle of the desired bevel of the padand moving transversely of the top of the pad and by providing means forfeeding this cutter along the pad in the path of the periphery thereof.

A further and more specific object of my invention is to provide anapparatus for beveling soft protective pads in a more efficient andfacile manner than formerly having a high speed rotary knife cutter withits cutting edge positionable in the plane of the desired bevel of thepad and having cam means bodily moving the cutter in the path of theperiphery of the pad to be beveled.

These and other objects of my invention will appear from time to time asthe following specification proceeds and with reference to theaccompanying drawings wherein:

Figure 1 is a view in side elevation of a beveling apparatus constructedin accordance with my invention;

Figure 2 is a front end view of the apparatus shown in Figure 1;

Figure 3 is an enlarged fragmentary detail plan view of the worksupporting table for the pad to be beveled;

Figure 4 is a fragmentary side view of the apparatus looking at theopposite side thereof from Figure 1;

Figure 5 is an enlarged fragmentary horizontal sectional view takensubstantially along line V-V of Figure 2;

Figure 6 is a fragmentary transverse sectional View taken through thebeveling apparatus and substantially along line VIVI of Figure 5;

Figure '7 is a fragmentary sectional view taken substantially along lineVII-VII of Figure 6;

Figure 8 is a fragmentary bottom plan view looking toward the'cuttingdisk and support from the bottom thereof, substantially along lineVIIIVIII of Figure 6;

Figure 9 is a fragmentary horizontal sectional view taken substantiallyalong line IX-IX of Figure 6;

Figure 10 is a fragmentary sectional view taken through the rotary diskcutter substantially along line XX of Figure 6; and

Figure 11 is a perspective view of a corn pad, beveled in accordancewith my invention.

Figures 1 and 2 of the drawings show a beveling machine I0 constructedin accordance with my invention, mounted on the top of a bench or tableII. The table II may be of any desired form and is herein shown as being'a well known form of table of the work bench type having a foot leverl2 transversely pivoted thereto and arranged to control raising andlowering of a rotary knife I4 to and away from the work, to form abeveled pad l5, as shown in Figure 11, from a felt having parallel topand bottom sides, as will hereinafter more clearly appear as thisspecification proceeds.

The beveling machine It includes a base it suitably mounted on the topof the table or bench H and having a column I9 mounted thereon andprojecting upwardly therefrom. An

overhanging or outboard support member 29 is mounted on the column i9adjacent its upper end, and projects outwardly therefrom and forms asupport for the knife M and the mechanism for driving and feeding saidknife. The outboard support 26 has an outer end portion 2%, the insideof which may be substantially cylindrical, open to the inside thereof,in which is slidably guided a post 23. The post 23 has rack teeth 2d cuton its rear face and also has a support plate 25 secured to its lowerend and extending outwardly therefrom. The support plate 25 has avertically extending motor support 26 at its outer end, to which issecured a drive motor 2'! having a vertical armature shaft 28 andforming a drive for the rotary knife is, and also forming a drive forthe means for feeding said knife in a path conforming to the contour ofthe pad to be beveled.

The post 23 is vertically adjusted with respect to the cylindricalportion 2i of the outboard support 29 by means of a pinion 29 on a shaft33 and meshing with the rack teeth 2%. Said pinion may be turned by ahand wheel ill on an outer end of shaft 38. Vertical movement of thepost 23 and cutter M. is limited by means of two vertically spacedknurled nuts 3232. The nuts 3232 are threaded on a vertical threadedshaft 33 in spaced apart relation with respect to each other and areadapted to engage opposite sides of a lug 3d, projecting laterally fromthe outboard support 28 and having the threaded shaft 33 passingtherethrough. The shaft 33 is mounted at its lower end on a strap 35secured to the post 23, for vertical movement therewith.

When the cutter disk It has been set to the proper cutting angle andheight, it may quickly be moved into or out of engagement with the feltby means of the foot lever E2. The foot lever l2, as herein shown, has alink 39 pivotally connected thereto intermediate its end and extendingupwardly therefrom. The link 38 is herein shown as being connected to aparallel upwardly extending link 60 by means of a coupling member fil,affording a means for adjusting the length of the resultant link formedby said connected links. A tension spring 43 connected between thebottom of the top of the table H and the coupling ll is provided to urgethe foot lever 12 into an upwardly extended position and raise the knifel4 above the work when foot pressure is relieved from the pedal of saidlever. The upper end of the link ii] is pivotally connected to one leverarm of a bell crank iii, transversely pivoted to the outboard support iton a pivotal pin 46, projecting outwardly therefrom. The other lever armof the bell crank 45 depends from the pivotal pin 45 and has a link 6'1pivoted thereto, connecting said bell crank to a lever arm 59, securedto the shaft 353. Depression of the foot lever l2 will thus pivot theshaft 3!] and pinion 29 in a direction, which in Figure 1 is a clockwisedirection, and move knife I l downwardly into engagement with the work.

The support plate 25 is herein shown as bein suitably secured to andprojecting outwardly from the post 23, adjacent the lower end thereof.The plate 25 has three radially spaced slots 53-53 extendingtherethrough from the top to the bottom thereof and intermediate theends of said plate and forming a means for adjustably mounting a supportmember 54 on the underside thereof, as by machine screws 5555 extendingthrough said slots and threaded within said support member (Figures 5and 6). The support Lil member 54 forms a support for a spindle 55mounted therein and depending therefrom. The spindle 56 has a reducedupper end portion 5'! extending through said support member andpartially through the support plate 25, and detachably secured theretoas by a set screw 5E. The spindle 55 has a sleeve 8!! mounted thereonhaving a rectangularly flanged lower portion 61. The sleeve fill is freeto rotate about the spindle 56 and is held in engagement therewith bymeans of a disk 53 mounted on a reduced lower end portion of saidspindle and abutting the bottom of the flange 6!. The disk 83 is hereinshown as being held to the reduced lower end portion of said shaft bymeans of a cam 66 having a hollow central portion encircling said shaft,and secured thereto as by a machine screw 66 threaded in the bottom ofsaid shaft. The bottom of the rectangular flange 6! has two parallelgibs fil-fil depending therefrom and extending along opposite sidesthereof and forming a slidable guide for a tool support 69. Two parallelspaced retaining strips ill-l0 are suitably secured to the bottoms ofsaid gibs and extend therealong and inwardly therefrom along theunderside of the tool support 69 to slidably support said tool supporton the bottom of said flange.

The tool support 69 as shown in Figures 6, 7, 8 and 9 comprises a flatplate '13 engaged by the retaining strips 'H!l0 and having an innercut-away portion M within which the cam 6-: extends. The plate (3 isherein shown as having a depending block 15 secured to the undersidethereof as by machine screws lt-'i6. The block it has an inner uppershouldered portion 'i'l having a cam follower I9 rotatably mountedthereon for engagement with the outer face of the cam 66.

The follower 19 is held in engagement with the cam G l by two tensionsprings 8l-3l (Figures 8 and 9). Said springs are secured at one oftheir ends to the outer end portions of a yoke-like portion 83 of thesupport plate '53 and at their opposite ends to machine screws 8 l8lthreaded within opposite outer sides of the flange 65. R0- tation ofthe sleeve 68 will thus rotatably drive the tool support 68, and wherethe cam 64 is of an irregular or oval formation said tool support willrectilinearly move along the gibs til-61 as itis rotatably driven by thesleeve to, following the contour of said cam, which may be in the formof the periphery of the corn pad being beveled. It is obvious that wherethe corn pads are circular, as shown in Figure 11, the cam 64 will be ofa circular formation and that with such a cam there will be notranslational movement of the tool support with respect to the sleeve68.

The block '15 as shown in Figure 6 has an inclined plane undersurface85, herein shown as being perpendicular to the desired bevel of the padalthough it may be at other angles, and as having a knife block 36adjustably secured thereto. As shown in Figures 6 and 10 a plurality ofapertures 3l8'= are formed in the bottom of the inclined surface 85, anyone of which may receive a pivotal pin 88 extending inwardly from theknife block 85, to form a pivotal support therefor. The knife block 86has a sector plate 89 formed integrally therewith and abutting thebottom of the inclined surface 85. The sector 89 has an arcuate slot 98extending therethrough, through which passes a machine screw 9 lthreaded in the block 15 and adjustably securing said knife block androtatable knife i l in position on the inclined surface 2:85. It shouldbenoted with reference to Figures land lONtha-t a pluralityof threadedapertures -92-:92-enter the-block from the inclined surface ;85, any oneof ww-hichmay have the machine screw SI threaded therein,-to adjust therake of the .knife [I4 with respectto the felt pad being cut, thethreaded aperture being used depending upon which aperture :81 the pin88 is inserted.

The knife block ,8'5, ,as herein shown, has two spaced bearings $13-53:mounted therein and forming a bearing support fora-knifez shaft v94,0nwhich a knife I4 is mounted. -.A collar 95 is=secured to the outer endof the shaft :94 to .hold said shaft within the bearings .9'3-.9-3 whilei3, pulley $6 is mounted adjacentthe-.oppositeend of said shaft. Saidpulley-has. ahub -9'labutted by the inner face of a knife I4. The knifeI4 is secured to said shaft, for rotation therewith, as by a Washer andnut 99 threaded on the lower enel'ofv saidshaft and abutting a hub I410of said disk knife.

The .rotary knife I4 is thus rotatablyiiournaled on the knife block .86with: its periphery inclined at the angle of the desired bevel of thepad and is fed to follow the periphery of the ,padfiduring-zthe bevelingoperation by rotatable :movementof the sleeve fill and .by translational.rnovement of the tool support 69 with respect thereto effected .byengagement of the cam-follower I9 rotating with said tool support withthe stationary :cam 64, formed to conform to the periphery of the padbeing .beveled.

The rotary knife I 4 is shown in Figures -6 and 10 as being in the formofa disk, the loweriace of which is fiat and the upper face of which isbeveled, sharpening the periphery of the disk to form a sharp rotaryknife-like cutting-edge. The knife I l is preferably formed fromhardened tool steel, and the angle of the .bevelededge thereof may vary,depending .upon theangle .of the .desired bevel of the .felt pad, andthe types of felt being beveled. A ten degreebevelhas been'found to beespecially suitable for beveling oval pads. Also both sides of thecutter may be beveled if desired.

The drive from the motor 21 to the rotary knife M includes .a pulley.llll journaled .on the sleeve .60 .on a bearing I03. A belt {05connects a motor pulley I06 on .a lower end of the .motor shaft 28 withthe pulley IlII, to .rotatably drive said pulley. The pulley Jill .isherein shown as having a pulley I09 disposed therebeneath and formedintegrally therewithandadapted to be engaged by and drive a spring beltMI] made from a closely wound coiled tension spring. The .belt I Ill hassufficient yieldability to maintain an efficient drive to the pulley .96and rotary cutter M in all positions of translational movement of thetool support 69 with respect to the sleeve til.

The spring belt IIE! extends horizontally from the pulley I09, overdirection changing idler pulleys I I2-I I2 and downwardly and inwardlytherefrom to and around the pulley 96 on the shaft 94. The directionchanging idlers -I I2---'I I2 are each mounted between the furcations ofbifurcated support members I'I'3II3, secured to the upper surface of theflange GI and projecting outwardly therefrom. The support bracketsII'3-I 13 are each inclined at theangle of inclination taken by the beltas it passes from the idlers I I2I I2 to the pulley 95, and supporttheir respective pulleys at such angles of inclination. A belt guide IIt is mounted on the bottom of the flange SI as by machine screws I I5II5.

Ihe b'elt g-guide H4 is herein shown as being of a stra'p-likeformation, made in two overlapping pieces, each of which engages one runof the underside of the belt and maintains sufficient tension on thebelt to hold it in engagement with the idlers II2-I I2 and the drivenpulley 86. It will here be noted that the pulley 96 is of relativelysmall diameter compared with the drive pulley I 09, so as to step up thespeed of'the knife-I4 to a higher rate of speed than the speed ofrotation of the motor 21.

The drive to the sleeve =60, rotatably feedingthe cutter disk It in thepath of the periphery of the felt .pad to be beveled, includes a chainand sprocket drive 'I'ItB driven fromthe upper end of the shaft .28-ofthe motor 21 through a suitable speed reducer, herein shown as beingbuilt into the'motor and not shown or described in detail since it maybe of any well known form 'and is nopart of my present invention. Thechain and sprocket drive I It serves to drive a transverse worm shaft III, journaled intermediate its ends in a bearing bracket IIiS dependingfrom the support plate 25. A'worm H9 on theinner end of the shaft II Imeshes with and drives a worm gear I26 mounted on the sleeve 69 abovethe pulley Ill-I, and secured to said sleeve as by set screw I2I.

A rotata'blework supporting table I23 is mounted on the top surface ofthe base It on a vertical spindle I224. The table I23, as herein shown,has a plurality of work carrying mandrels I25 projecting upwardly fromits top surface, and shown as being located apart, although they neednot be :so located. Each of said mandrels has a shouldered upper portionI26 adapted to have a felt corn .pad mounted thereon and to hold it inposition during the beveling operation. If desired an adhesive orabrasive member may be placed on the shoulder I26, to restrain the padfrom rotation, although where the fit of the pad is snug, this :is-notnecessary.

A dog I 21, ,pivotally mounted on the top sur- I face of the base IS ona piovtal pin I29 is provided to index the table I23 (see Figure 3). Thedog I Z'I'is engageable with any one of a plurality of notches Hid-I30formed in the periphery of the table I23. An-arm I3'I projects from thedog I2! to permit disengagement of said dog from the respective notchI3lI by hand. A tension spring I32, connected between the table and thelever arm I3I, intermediate the ends thereof, is provided to hold thedog I2! in engagement with the required notch.

A depending indexing bar I33 is provided to positively hold the table inposition during the beveling operation. Said bar is secured to anddepends from a bracket I 34, -herein shown as projecting outwardly fromthe support bracket 25. The indexing bar I33 has a reduced lower endportion adapted to register with any one of a plurality of aperturesI35'I35 formed in the base plate I6, upon lowering movement of the knifeI4 into position to bevel the felt pad (see Figures '5 and 6) Inoperation of the machin the mandrels I 25 may first be loaded with pads,the spring 13 holding the rotary knife I4 'to an elevated inoperativeposition. The table I23 may then be turned un til the "dog I27 engages anotch I3ll, indicating that a pad is in the correct position forbeveling. The proper cam 6'4 being mounted on the lower end of thespindle 5'6 and the proper knife being mounted on the shaft 94, themotor 21 may then be started. At "the same time pressure may be exertedon the pedal of the foot lever 12 by the foot, to engage the indexingbar 133 with the respective aperture [35 and to lower the rapidlyrotating and orbitally traveling knife Hi into beveling engagement withthe top surface of the felt. Downward movement of the rotary knife 14-and the depth of the bevel is limited by the upper knurled stop nut 32.engaging the lug 34 (see Figure 2). The rapidly rotating knife Hifollowing the contour of the pad will thus cut the outer edge of the topsurface thereof at the desired angle and depth along the entireperiphery of the the pad, as shown in Figure 11. When beveling of thefirst pad is completed, the foot may be released from the pedal of thefoot lever IE to allow the spring d3 to raise the knife it out ofengagement with the felt. The dog t2? may then be released and the plateI23 turned to position another felt in the proper aligned relation withrespect to the beveling knife M. The dog engaging the proper indentationl3! to index the table l23 until positively held in position by theindexing bar m3, the foot may be engaged with the pedal of foot lever i2to again bring the indexing bar 333 into engagement with an aperture I55and bevel the top surface of another felt pad. As one pad is beveled itmay be removed from its supporting mandrel during the beveling operationof the next pad and another pad placed on said mandrel, thus affording asubstantially continuous beveling operation.

It may be seen from the foregoing that a new and improved method andapparatus has been provided for beveling felt pads by cutting the upperouter surface thereof at an angle by a rapidly rotating knife-likecutter moving transversely of the pad at the angle of the bevel at ahigh velocity and at the same time, following the contour of theperiphery of the pad, making it economically feasible to suppl beveledcorn or protective pads for use by the general public. It may further beseen that the beveling of the pad is attained due to the high velocityof the inclined knife-like rotating cutter following the contour of thepad, and that the apparatus may be adapted to cut felt pads of variousdesired contours merely by the substitution of cams having cam surfacesconforming to the contour of the pad to be beveled. It may also be seenthat various types of cutters may be substituted to suit variousconitions and grades of felt, and that the angle of th knif with respectto the pad may likewise be varied in accordance with the desired bevelof the pad, the shape of the knife used and the softness of the materialbeing beveled. It may further be seen that the apparatus is of a simpleand efficient construction, which may readily and safely be operated athigh speed production rates by relatively unskilled operators, with noattention from the operator, except to remove and load the pads, andbring the next succeeding pad into position to be beveled.

It may be understood that modifications and variations may be effectedwithout departing from he scope of the novel concepts of the presentinvention.

I claim as my invention:

1. In an apparatus for beveling felt pads, a frame, a table having amandrel thereon adapted to support a pad for beveling, a spindle mountedon said frame in vertically spaced relation with respect to said table,a support member journalled on said spindle for movement thereabout, amotor on said frame, a drive connection from said motor to said supportmember, a tool support depending from the bottom of said support memberand supported and guided thereon for rectilinear movement with respectthereto, a cam and follower interposed between said spindle and toolsupport, one being stationary and the other being movable about theother, yieldable means holding said cam and follower in engagement witheach other and effecting movement of said tool support in a pathconforming to the perlphcry of the pad to be beveled upon rotationalmovement thereof with respect to said spindle, a rotary knife mounted onsaid tool support for rotation transversely of the surface of the pad tobe beveled and in the plane of the desired bevel of the pad, and a driveconnection from said motor to said knife including a member coaxial withsaid spindle, and a spring belt driving said knife from said coaxialmember in all positions of relative movement between said knife and saidcoaxial member.

2. In an apparatus for beveling felt pads, a frame, a table having amandrel thereon adapted to support a pad for beveling, a spindle mountedon said frame in vertically spaced relation with respect to said table,a support member journaled on said spindle for movement thereabout, amotor on said frame, a drive connection from said motor to said supportmember, a tool support depending from the bottom of said support memberand supported and guided thereon for rectilinear movement with respectthereto, a cam and follower interposed between said spindie and toolsupport, one being stationary and the other being orbitally movablethereabcut, yieldable means holding said cam and follower in engagementwith each other and effecting movement of said tool support in a pathconforming to the periphery of the pad to be beveled upon rotationalmovement of said support memher with respect to said spindle, a rotaryknife mounted on said tool support for rotation in the plane of thedesired bevel of the pad, a pulley journaled for rotation about an axiscoaxial with the axis of rotation of said spindle, and rotatably driventhereabout by said motor, a drive connection from said motor to saidpulley, another pulley coaxial with the axis of rotation of said knifeand disposed at an acute angle with respect to said first pulley forrotatably driving said knife, an extensive spring belt connecting saidpulleys in driving and driven relation with respect to each other, andguide means rotatably movable with said support member and guiding saidbelt from one pulley to the other, to rotatably drive said knife in allpositions of relative movement of said knife with respect to said firstpulley.

3. In an apparatus for beveling felt pads, a frame, a table having amandrel thereon adapted to support a pad for beveling, a spindle mountedon said frame in vertically spaced relation with respect to said table,a support member journaled on said spindle for movement thereabout, amotor on said frame, a drive connection from said motor to said supportmember, a tool support depending from the bottom of said support memberand supported and guided thereon for translational movement therealong,a cam and follower interposed between said spindle and tool support, onebeing stationary and the other being orbitally movable, yieldable meansholding said cam and follower in engagement with each other andeffecting movement of said tool support in a path conforming to theperiphery of the pad to be beveled upon rotational movement of saidsupport member with respect to said spindle, a rotary knife mounted onsaid tool support for rotation in the plane of the desired bevel of thepad and movable transversely of the face of the pad to be beveled, adrive connection from said motor to said knife for rotatably drivingsaid knife in all positions thereof with respect to said spindle, andoperator operated means operatively connected with said tool support forvertically moving said tool support and knife downwardly into engagementwith the pad to be beveled and spring means for moving said knife out ofengagement with a pad to be beveled upon the release of said operatoroperated means.

4. In an apparatus for beveling felt pads, a frame, a table adjustablymounted thereon, a plurality of mandrels on said table for supportingthe pads for beveling, a support member rotatably mounted on said frameand spaced vertically with respect to said table, a motor on said frame,a drive connection from said motor to said support member, a toolsupport depending from the bottom of said support member and supportedand. guided thereon for rectilinear movement with respect thereto, a camand follower for rectilinearly moving said support with respect to saidsupport member, yieldable means holding said cam and follower inengagement with each other and effecting movement of said tool supportin a path conforming to the periphery of the pad to be beveled uponrotational movement of said support member, a rotary knife mounted onsaid tool support for rotation transversely of the face of the pad to bebeveled and in the plane of the desired bevel of the pad, a driveconnection from said motor to said knife for rotatably driving saidknife in all positions thereof with respect to said spindle, means undercontrol of the operator for vertically moving said tool support andknife downwardly into engagement with the pad to be beveled, springmeans disengaging said knife from the beveled pad, and an interengagingconnection between said tool support and table engageable upon movementof said cutter downwardly into working engagement with the pad to bebeveled, to hold said table and the pad to be beveled in alignedposition with respect to said knife.

5. In an apparatus for beveling soft felt pads, a frame, a tableadjustably mounted on said frame and having a plurality of mandrelsthereon for supporting the pads for beveling, a spindle mounted on saidframe above said table, a support rotatably mounted on said spindle, amotor for rotatably driving said support, a tool support depending fromthe bottom of said support and supported and guided thereon forrectilinear movement with respect thereto, a cam on said spindle and afollower on said tool support for rectilinearly moving said tool supportwith respect to said table upon rotation of said tool support, a kniferotatably journalled on said tool support for rotation transversely ofthe face of the pad to be beveled and. in the plane of the desired bevelof the pad, extensible drive means for rotatably driving said knife atsubstantially the speed of said motor in all relative positions of saidknife with respect to said motor, operator operated means for loweringsaid support and knife into pad beveling position, spring meansreturning said knife out of pad beveling position, and an indexing barsecured to said support for vertical movement with said knife and havinginterengagement with said table, to align said table and a mandrelthereon with said knife upon movement of said knife into a pad bevelingposition.

6. In an apparatus for beveling felt pads, a frame, a table rotatablymounted on said frame, a plurality of mandrels on the top of said tablefor supporting the pads for beveling, a spindle mounted on said frame, asupport rotatably mounted on said spindle and spaced vertically withrespect to said table, a motor on said frame, means driven by said motorfor rotatably driving said support, a tool support depending from thebottom of said support and supported and guided thereon for rectilinearmovement with respect thereto, a cam secured to said spindle, a followeron said tool support engageable with said cam, a spring engaging saidfollower with said cam, a knife rotatably journalled on said toolsupport for rotation transversely of the face of the pad to be beveledand in the plane of the desired bevel of the pad, means driving saidknife from said motor at substantially the speed thereof comprising apulley journalled on said tool support for rotation about the axis ofsaid spindle and driving by said motor, an extensible spring belt, apulley secured to said knife for rotatably driving said knife, meansguiding said belt from one pulley to the other, a foot pedal, link andrack means operated by said foot pedal and operatively connected withsaid support, for lowering said support and knife into pad beveling uponoperation of said foot pedal, a spring operatively connected with saidfoot pedal for raising the knife from said mandrel upon release of footpressure from said pedal, means indexing said table, and an indexing barsecured to said support for vertical movement with said knife and havinginterengagement with said table to align said table and a mandrelthereon with a pad to be beveled upon movement of said knife into a padbeveling position.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 427,199 Sheldon May 6, 1890 761,077 Johnson May 31, 1904815,564 Stickney Mar. 20, 1906 1,228,365 Martin May 29, 1917 1,915,988Frank June 27, 1933 1,934,997 Singer Nov. 14, 1933 1,966,962I-Iorhorouny July 17, 1934 1,972,133 Darrow Sept. 4, 1934 2,335,767Kinports Nov. 30, 1943 2,436,401 Petersen Feb. 24, 1948 2,439,794Bugatti Apr. 20, 1948

